#include <ArduinoJson.h>

void setup() {
  Serial.begin(9600);
  // put your setup code here, to run once:

  // Data parsing

  DynamicJsonDocument doc(256);
  
  String input = "{\"cmd\": \"ACK\", \"ts\": 1000000, \"data\": {\"origins\": [\"NIC\", \"COL\", \"HON\"], \"vendors\": [\"Royal Coffee\"]}}";
  DeserializationError error = deserializeJson(doc, input);
  if(error) {
    Serial.print("Parse failed");
    Serial.println(error.f_str());
    abort();
  }

  serializeJsonPretty(doc, Serial);

  JsonObject data = doc.as<JsonObject>();

  // Get single value directly.
  String cmd = data["cmd"];
  Serial.println(cmd);
  // Get all array values.
  JsonArray origins = data["data"]["origins"].as<JsonArray>();
  for (JsonVariant origin : origins) {
      Serial.println(origin.as<String>());
  }
  // Get key value pairs.
  for (JsonPair node : data) {
    Serial.println(node.key().c_str());
    serializeJsonPretty(node.value(), Serial);
    Serial.println("");
    // Serial.println(node.value().c_str());
  }
  // Check map containment.
  Serial.println(data.containsKey("cmd"));
  Serial.println(data.containsKey("code"));

  // Data writing.
  DynamicJsonDocument out(256);
  JsonObject dataOut = out.as<JsonObject>();
  dataOut["cmd"] = "createPallet";
  dataOut["ts"] = millis();
  dataOut["data"]["origin"] = "NIC";
  dataOut["data"]["vendor"] = "Royal Coffee";
  dataOut["data"]["received"] = "2022-08-16";
  /*
  // You can use a String as your JSON input.
  // WARNING: the string in the input  will be duplicated in the JsonDocument.
  String input =
      "{\"sensor\":\"gps\",\"time\":1351824120,\"data\":[48.756080,2.302038]}";
  deserializeJson(doc, input);
  JsonObject obj = doc.as<JsonObject>();

  // You can use a String to get an element of a JsonObject
  // No duplication is done.
  long time = obj[String("time")];

  // You can use a String to set an element of a JsonObject
  // WARNING: the content of the String will be duplicated in the JsonDocument.
  obj[String("time")] = time;

  // You can get a String from a JsonObject or JsonArray:
  // No duplication is done, at least not in the JsonDocument.
  String sensor = obj["sensor"];

  // Unfortunately, the following doesn't work (issue #118):
  // sensor = obj["sensor"]; // <-  error "ambiguous overload for 'operator='"
  // As a workaround, you need to replace by:
  sensor = obj["sensor"].as<String>();

  // You can set a String to a JsonObject or JsonArray:
  // WARNING: the content of the String will be duplicated in the JsonDocument.
  obj["sensor"] = sensor;

  // It works with serialized() too:
  obj["sensor"] = serialized(sensor);

  // You can also concatenate strings
  // WARNING: the content of the String will be duplicated in the JsonDocument.
  obj[String("sen") + "sor"] = String("gp") + "s";

  // You can compare the content of a JsonObject with a String
  if (obj["sensor"] == sensor) {
    // ...
  }

  // Lastly, you can print the resulting JSON to a String
  String output;
  serializeJson(doc, output);
  */

  /*
  doc["sensor"] = "gps";
  doc["time"] = 1351824120;

  // Add an array.
  //
  JsonArray data = doc.createNestedArray("data");
  data.add(48.756080);
  data.add(2.302038);

  // Generate the minified JSON and send it to the Serial port.
  //
  serializeJson(doc, Serial);
  // The above line prints:
  // {"sensor":"gps","time":1351824120,"data":[48.756080,2.302038]}

  // Start a new line
  Serial.println();

  // Generate the prettified JSON and send it to the Serial port.
  //
  serializeJsonPretty(doc, Serial);
  // The above line prints:
  // {
  //   "sensor": "gps",
  //   "time": 1351824120,
  //   "data": [
  //     48.756080,
  //     2.302038
  //   ]
  // }
  */
}

void loop() {
  // put your main code here, to run repeatedly:

}